Indeed, this "fix" is a nightmare (replying to this bug report has been a nontrivial task).
My Thunderbird refuses to start if I have: * Neither .icedove nor .thunderbird * Only .thunderbird And the migration somehow put a .thunderbird inside the .icedove when I put an empty .icedove folder. Sorry for the annoyed tone, but this has made Thunderbird completely non-functional, unless I directly start "/usr/lib/thunderbird/thunderbird-bin". Package version: 1:45.7.1-2
